// JavaScript Document
function valida() { 
     email=document.login.email.value; 
	if (email=="") { 
     alert ("Email is necessary for making the login!"); 
     document.login.email.focus();
     document.login.email.select();
     return false; 
   } 
   pass=document.login.pass.value;
   if (pass==""){
   alert("Password is necessary for making the login!");
     document.login.pass.focus();
     document.login.pass.select();
   return false; 
   }
}